#pic1 {
	position: absolute;
	top: 35%;
	left: 35%;
}

#pic2 {
	position: absolute;
	top:45%;
	left: 35%;
}

#pic3 {
	position: absolute;
	top: 35%;
	left: 45%;
}

#pic4 {
	position: absolute;
	top: 45%;
	left: 45%;
}